Multi–Touch : Surface computing recognizes many points of contact simultaneously, not just from one finger like with a typical touch–screen, but up to dozens of items at once. Surface is optimized for 52 touches at a time.
When you going to a restaurant and place a wine glass on the table which is actually a Microsoft Surface. The wine menu appears. You select the wine of your choice and the order is received by the staff, without a single word of verbal communication. This accepts multiple ‘touch’ and many people may select the item on the menu and drag the item they want to order with their fingers to place the order.
You go to a mobile stores and want to check the models you like and compare few models. Just pick them off the rack and place them on the Microsoft Surface. You can see the features as well as the comparisons.
1) Screen – • There is a diffuser which turns the Surface’s acrylic tabletop into a large horizontal “multitouch” screen, which is capable of processing multiple inputs from multiple users. The Surface is so far advanced than we could imagine that it can recognize objects by their shapes or by reading coded “domino” tags when placed on the table.
2) Infrared – • Surface’s “machine vision” operates in the near-infrared spectrum, using an 850 -nanometer-wavelength LED light source aimed at the screen. When objects touch the tabletop, the light reflects back and is picked up by multiple infrared cameras with a net resolution of 1280 x 960.
3) CPU – • Surface uses many of the same components found in everyday desktop computers — a Core 2 Duo processor, 2 GB of RAM and a 256 MB graphics card. Wireless communication with devices on the surface is handled using WiFi and Bluetooth antennas (future versions may incorporate RFID or Near Field Communications). The underlying operating system is a modified version of Microsoft Vista.
4) Projector - A projector underneath the surface projects an image onto its underside, while five cameras in the machine's housing record reflections of infrared light from human fingertips.
There are four main components being important in it's interface: direct interaction, multi-touch contact, a multi-user experience, and object recognition. This device also enables drag and drop digital media when wi-fi enabled devices are placed on it such as a Microsoft Zune, cellular phones, or digital cameras. It features multi-touch technology, that enables multiple points of contact.